Gas-controlling means for regenerative furnaces.



W. REITMEISTER.

GAS CONTROLLING MEANS FOB. REGENERATIVE FURNACES.

APPLICATION FILED FEB. 6, 1913. Lfiw l 59. Patented 001;. 7, 1913.

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WILHELM REITMEISTEBI, OF SIEGBUBG, GERMANY.

GAS-CONTROLLING- MEANS FOR BEGENERATIVE FURNACES.

Specification of Letters Patent.

Application filed February 6, 1913.

To all whom, it may concern:

Be it known that I, VVILHELM Rnrrrrnrs- TER, a citizen of the GermanEmpire, residing at Siegburg, in the Province of Rhenish Prussia,Germany, have invented certain new and useful Improvements inGas-Controlling Means for Regenerative Furnaces, of which the followingis a specification.

This invention relates to that type of gas reversing valve forregenerative furnaces in which the gas stop valve is connected in such amanner to the reversing valve that it is closed during the reversing toprevent losses in gas. According to the known reversing valves of thistype a special regulating valve must be provided, in addition to thestop valve, which according to the requirements of the furnacesregulates the supply of the gas to the latter.

The present invention permits of the regulating of the gas supply to thefurnace by the stop valve which is controlled by the reversing valvewithout aflecting the reversing valve. For this purpose the transmissionof the movements of the reversing valve is effected, according to thisinvention, by means of the interposition of an adjustable pulley block.

In the accompanying drawings, Figure 1 is an elevation, partly insection, illustrating diagrammatically a constructional form of theinvention; and Fig. 2 is a fragmentary plan illustrating a portion ofthe apparatus.

The reversing valve consists, as is known, of two bells b, b, which areconnected together and balanced by counterpoises 0, which bellsaccording to their position conduct the gas-air mixture alternately fromthe left or the right into the furnace and simultaneously alternatelyconnect the right or the left side of the furnace with the flue. Thereversing is effected in the known manner by first raising the bells b,b by means of a hand lever t and then rotating them through an angle of90 by means of the spanner f, whereupon they are again lowered. To thebells b, b is connected, as is known, the gas stop valve (Z which isprovided in the conduit leading to the reversing valve in such a mannerthat when raising the reversing bells Z) b it is closed, whereas whenrotating the bells it remains closed and on lowering the bells it isagain opened. In the known reversing valves, the reversing bells areconnected to the valve plate (Z sim- Patented Get. 7, 1913.

Serial No. 746,569.

ply by a rope, a chain, or the like, which is connected directly to thecounterpoise lever or to another lever connected to the bells and alsodirectly to the spindle of the valve (Z. According to the presentinvention, however, an adjustable pulley block is provided between thereversing valve 6 and the gas stop valve (Z. In the constructional formillustrated a rope h is connected to one of the counterpoises or to oneof the counterpoise levers a or to another lever connected to the bells,which rope is guided over the free pulley z' and two stationary pulleys70, Z and tensioned by a weight m. The weight m serves simultaneously asa stop for a regulating spindle a which at its lower end is provided asa fork and can, by this spindle n and by means of the hand wheel 0, beraised and lowered. To the free pulley z' of the adjustable pulley blockthus formed is connected a rope g which passes over two stationarypulleys to the spindle s of the valve plate (Z and is secured to thespindle. The stop valve is in this manner so connect-ed to the reversingvalve Z), 5 that it must take part in the upward and clownwar-dmovements thereof and on the rise of the bells b b it is closed, on thedownward movement again opened. By means of the pulley block abovedescribed the stroke of the valve plate (Z and thus the gas supply tothe furnace can be adjusted. This is effected by the adjustment of theweight m by means of the spindle a and the hand wheel 0.

By depressing the weight m in adjusting the spindle a, the upwardmovement of valve cl is increased, and vice versa. Due to theinterposition of the pulley block aforesaid, the force acting on thevalve plate cl when the weight m is lowered will be twice that acting onthe lever arm a and will consequently be without effect on the reversingvalve b, b. When the regulating spindle a is adjusted upwardly, thevalve plate (Z only is lowered correspondingly; and the adjustment ofsaid valve is therefore effected wholly independently of'the reversingvalve b, I). In raising the latter valve, the former simply drops to itsseat, whereupon the further movement of the pulley block is taken up bythe lowering of the weight m. In lowering the said reversing valve,weight m returns until it engages a plate 9 at the end of the spindle a,Whereupon valve plate d is again lifted from its seat the same distanceit was lowered, that is to say, the said valve is opened the distance towhich it was adjusted. The bells b, b are, therefore, required to beonly slightly heavier than the counterpoises plus the weight of thevalve plate (Z, that is, they may be practically balanced. It will benoted, moreover, that in making an adjustment, with the lowering of theweight m only the valve plate d, which is lighter than the said bells,will be lifted; and only when the valve plate d encounters a resistancecan the adjustment of the spindle n, that is say, the lowering of theweight m effect a move ment of the bells Z), Z). To provide against suchcontingency, a suitable pivoted catch 11 may be provided to engage thehand lever t, said catch being provided with a releasing foot piece w.The stop valve (Z is arranged to be positively connected to the spindlea through the rope g passing over the pulley block it and in such amanner that the said spindle acts only in a direction for opening thebells. To overcome the eflect of any internal resistance which mightoccur, for example in the rope or pulley mechanism, to prevent thelowering of the valve plate d, when adjusting the spindle n for thepurpose of controlling the stroke, the said adjusting device is arrangedto be positively connected to the spindle of the stop valve (Z in adirection to act to close the latter. This is effected in theconstructional form illustrated by a forked lever divided in theproportion 1 2, which is fulcrumed at 1". The longer arm 9 of the leveris supported on a plate 10 or the like provided on the regulatingspindle a while the short arm 9 is hinged in any suitable manner to thevalve spindle s. The arm Q can for example be forked so that it cansurround the guide pulley for the rope g on the valve casing e and itssupport. The lever 9 does not affect the movements of the valve plate dtransmitted from the reversing valve 5 Z). If for example in any openposition of the valve plate d, the valve .7) .7) is reversed the valveplate is lowered and the lever arm 9 swings upward unhindered.

Claims:

1. In a gas reversing valve, having a gas stop valve controlled threby:means transmitting the movements of the reversing valve to the gas stopvalve and including an interposed pulley block, means to adjust saidpulley block, and means to positively connect said adjusting means tothe gas stop valve for closing the latter.

2. In a gas reversing valve, having a gas stop valve controlled thereby,a rope at one end connected to the gas stop valve, a free pulleyconnected to the other end of the said rope, a rope guided around thesaid free pulley, and connected to the reversing bell, a weight loadingsaid rope, a spindle to adjust said weight, and a lever connecting saidadjusting spindle to the spindle of the gas stop valve for closing thelatter.

In testimony whereof I have hereunto signed my name to thisspecification in the presence of two subscribing witnesses.

WILHELM REITMEISTER.

Witnesses:

KURT v. STADLER, LOUIS VANDORY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

